SYNTHESIS AND MAGNETIC-PROPERTIES OF FE7C3 PARTICLES WITH HIGH SATURATION MAGNETIZATION

被引：35

作者：

TAJIMA, S

HIRANO, S

机构：

[1] Department of Applied Chemistry, Nagoya University, Chikusa-ku, Nagoya, 464-01, Furo-cho

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1990年 / 29卷 / 04期

关键词：

Barium-containing Fe[!sub]3[!/sub]O[!sub]4[!/sub; Carbon monoxide; Coercivity; Fe[!sub]5[!/sub]C[!sub]2[!/sub; Fe[!sub]7[!/sub]C[!sub]3[!/sub; Magnetic recording media; Ratio of residual magnetization to saturation magnetization; Saturation magnetization;

D O I：

10.1143/JJAP.29.662

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The formation behavior and magnetic properties of Fe7C3 particles were investigated under atmospheric pressure. The starting material of barium-containing iron oxide was carbureted with CO by heat treatment. Fe7C3 particles were formed in the reaction temperature range of 300–375°C along with a small amount of Fe5C2 particles. Fe7C3 content in the product increased with the increase in the partial pressure of CO and the decrease in the reaction temperature. DTA-TG analysis revealed that the product contained about 5–10 wt% free carbon. The saturation magnetization of the product was about 110 emu/g regardless of the reaction conditions. The coercivity and the ratio of the residual magnetization to the saturation magnetization increased with the increase of the Fe7C3 content in the product. © 1990 The Japan Society of Applied Physics.

引用

页码：662 / 668

页数：7

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